Means for extracting form ties from cast concrete



June 27, 1939. s, 5 CQLT 2,164,031

MEANS FOR EXTRACTING FORM TIES FROM CAST CONCRETE Filed Nov. 23, 1938 2Sheets-Sheet l 42 I lgf/5 /7 212/ /o 26 F/Zf/Z 4'5 Il, a? I Z6 if /2 a Af I 2" f/J 47 l I d [l/ Li um j b Z7 TL- A@ o 2s 5' y I 5 l ATTORNEY.

vJune 27, 1939. s. s. coLT 2,164,031

MEANS FOR EXTRACTING FORM TIES FROM CAST CONCRETE BY M @d Mh ATTORNEY.

Patented June A27, 1939 MEANS FOR EXTRACTING FORM TIES FROM CASTCONCRETE Samuel S. Colt, West Orange, N. J. Application November z3,193s, serial No. 241,886

9 Claims.

This invention relates to improvements in devices for withdrawing formWall tie rod-s, wires 4and the like from east concrete, -and for likeoperations; and the invention has reference, more particularly, to anVimproved tool for such purposes of :the general type and kind shown inmy `.co-pending application for United States Letters. Patent Ser. No.205,698, ,filed on or about May 3, 1938,

This invention has for an object to provide ina tool of the typementioned a novel form and arrangement of rod soiling sheer cam block incombination with the rod winch roll and gripper means, whereby saidsheer cam block is adjustably supported relative to the winch roll, andin such manner as to provide an auxiliary supporting bearing therefor.

Another object of the invention is to provide means to bear the thrustof spacer Washers with "which form tie rods are often provided, wherebysaid washers are held immovable and'free from the risk of distortionWhile the tie rod is being extractedfrom a concrete mass and coiled bythe functional operation of the tool in use.

Another object of this invention is to provide means for reenfnrcingboth the tool lever against distortion and-the winch roll .againstdisplacement `under stresses to which the tool is subjected in use. Y f

i-Stillanother object .of the invention'is to provide manipulatablemeans for securing relatively movable parts of the tool in foldedtogether relation `wheny the tool .is not in use, and While beingcarried about'from place to place.

"Other objects: of this invention, not at this time more particularlyenumerated, will be understood from the 'followingV detailed descriptionof the same. n

An illustrative embodimentof the present invention is shown intheaccompanying drawings, in which: l i

Fig; lis :a side elevation of thenovel rod pulling tool as applied tothe Work in the performance of its functions; Fig. 2 is a top endelevation ci the same as viewed dovmwardly in Fig. l; Fig. 3 is a viewshowing a spacer washerequipped tie rod,`as relatedto'a concrete massprior to extracting the rod from said mass; Fig. 4 is a front elevationof the `novel tool; and Fig. V5 is a vertical -c'r'oss sectional view ofthe same; taken on `line 5-5 in Fig. l. I i

Fig. Y6 lsa side elevation ofthe novel tool as folded togetherwithitsparts secured against relative movement, and `thus subject to beconveniently carried about from place to place.

Similar characters of reference are employed in the above described?views, to indicate correspend-ing parts. v

Referringto the' dr wings, the 'referencechar- `21361281.' 10 indicatesa astconcetemass `.from a face of which a wall of the form in which themass was cast has been removed, leaving exposed a projecting end of animbedded form wall tie rod I I desired to be extracted from the concretemass.

In many instances spacer discs or washers I2 are affixed o-n the tierods II against inward movement thereon, as by means of stop projectionsI3 (see Fig. 3) raised out of the rod material behind the discs orwashers, whereby the form wall, by abutting the thus xed discs orwashers, is held against inward displacement relative to the forminterior prior to casting concrete therein. After the concrete has beencast and set, and theform dismantled, it is desirable, when extracting atie rod, to` hold the disc or washer immovable and to pull therod'therethrough as the latter is drawn outward, thus preventing thedisc or washer from interfering with thev desired and efficientoperation of the rod extracting tool.

The novel tie rod extracting tool, according to the instant invention,comprises a foot plate I4 from which outwardly projects a bearingbracket I5 pro-vided with a laterally disposed bearing hub I6. Mountedon said hub I6 is a pivoting spindle or journal bolt I1. Fulcrumed onsaid journal bolt I'I is a hand lever I8. Also mounted on said journalbolt I'I, adjacent to one face of said hand lever I8, is a freelyrotatable winch-roll I 9. Aihxed tothe hand lever I8,-so as to springfrom its other face, is a reenforcing member or yoke bar 20 having anoffset leg portion 2l which abuts the bearing hub end, 'and throughwhich the journal bolt ll also extends, the assembly being retained inplace by anut 22 which engages the journal bolt Il. The provision ofsaid reenforcing member or yoke bar stiiens the hand lever againstdistortion, and also reenforces the mounting of the Winch-roll so thattrue running rotation thereof is assured.

Mounted on the hand lever Iain parallel spaced relation thereto andvabove the winch-roll I9 is a strap-member 23 to form with said handlever a bifurcate mounting for'the support of a releasable rod cr wiregripping means .to cooperate with said Winch-roll I9. Said wire grippingmeans comprises an eccentric gripper-head 24 having gripper serrationsor teeth 25 formed on peripheral portions thereof, and the same ispivotally mounted on la transverse pivot pin 26 which is supported byand between the hand lever I8, said strap-member 23, and said legportion 2l, being fixed against displacement by cotter pins 25'. Thisdisposition and mounting of the pivot pin 26 also assists in stiffeningthe assembly of hand lever I8, strap 23 and yoke bar 2B and its leg 2Iagainst relative displacement or distortion. Extending from said`gripper head 24 is a lever arm 2l for manipulating the same. f.

Cooperating withtsaidwinch-rloll I9 is a sheer cam block 28, theiis'amebeing supported by the bracket I5 between said winch-roll I9 and thefoot plate I4, but so as to be adjustably disposed relative to theformer. The means for thus supporting the sheer cam block comprises astud bolt 29 which extends. through a slot 30 formed in the bracket I5so as to screw into the at inner side 3| of said sheet cam block 28which is contiguous to said bracket I5. Preferably said stud bolt 29 isprovided with an elongated collar 32 mounted thereon between its head 33and the bracket I5. The outer side of said sheer cam block 28 is formedto provide a sheer cam face 34 in shape of an upwardly and outwardlyinclined spiral plane. The top end 35 of said sheet cam block lies in aplane horizontally tangent to the top side of said winch-roll I9.Associated with the rearward side of said sheer cam block 28 are one ormore adjusting screws 35 which thrust against the foot plate I4 to whichthey are opposed. The forward side of said sheer cam lock is providedwith a curvilinear bearing face 31 adapted to fit against the side ofthe winchroll I9 to which it is opposed, thus bracing and supportingsaid winch roll against the stresses exerted by an outwardly pulledtie-rod thereon. By slightly loosening the stud bolt 29, and thenadjusting the screw or screws 36, the sheer cam block 28 may be movedrelative to and into the described supporting or bracing relation to thewinch-roll I9, after which adjustment is made, the stud bolt 29 is againtightened. Any wear between the winch-roll and sheer cam block cantherefore be compensated for as may be from time to time necessary. Saidsheer cam block is so shaped as to provide a portion having a facesurface 28 substantially parallel to the plane of the oot plate I4 anddisposed to lie in the path of swinging movement of said hand lever I8,thus serving, by its lower portion, as a stop to .limit thedown-swinging movement of said hand lever I8, and, by its upper portion,a stop to limit the up-swinging movement of said hand lever i8.

Provided in the upper end portion of the foot plate I4 is a downwardlyindenting slot or way 38 through which the exteriorly projecting end ofa tie-rod II may extend to pass over the top of the sheer cam block 28and thence to and around the winch-roll. Said sheer cam block 28 isfurther provided at its upper end with a guide projection 39 by whichthe outwardly extending tie-rod portion is retained against displacementas it passes to and over the winch-roll i9.

The means to support a spacer disc or washer against the thrust of anoutwardly moved tierod l I provided with the same, comprises a stoppiece48 of a width corresponding to the width of the foot plate slot or way38, said stop-piece being so mounted as to be movable to either anoperative position wherein it is disposed within said slot or way 38above the tie-rod passing therethrough and ush with the concretecontacting face of said foot plate I4 so as to engage the spacer disc orwasher I2, or to an inoperative position wherein it is withdrawn fromsaid slot or way 38 and laterally offset therefrom, so as to leave theslot or way 38 unimpeded for entrance thereinto of the tie rod when thetool is applied to a concrete mass from which it is desired to extractsaid rod.

One means for mounting said stop-piece 49 so as to be capable of theselective operative or inoperative dispositions above mentioned,comprises the mounting of said stop-piece 4I) on a carrier bar 4I whichis both slidable and rotatable relative to a supporting bearing 42therefor; said bearing being suitably aixed to said foot plate I4. Thestop-piece 40 is provided with a nger piece or lever arm 43 formanipulating the same and its carrier bar 4I. A stop-pin 44 which isafiixed to and projects from the foot plate I4 limits the slidingmovement of the carrier bar and stop-piece so as to determine theoperative register of the latter with the slot or way 38. A secondstop-pin 45 carried by the stop-piece, by abutting the face of thefoot-plate I4 limits the rotary movement of said carrier bar andstoppiece so as to determine the operative entered disposition of thelatter into the slot or way 38, and into abutting relation to a spacerdisc or washer I 2.

In the use and operation of the tool, after a form wall has been removedfrom the concrete mass I8, and the projecting end portion of a tierod II is thereupon rendered accessible, the novel tool is applied to thelatter. To so apply the tool, the foot plate I4 is abutted against theface of the concrete mass IU in such manner that the tie rod extendsthrough the slot or way 38 and thence across the top of the sheer camblock 28 and over the top of the winch-roll I9, whereupon the gripperhead 24 is swung downwardly to engage the tie rod II with its serrationsor teeth 25, thus gripping the tie-rod between the winch-roll and saidgripper head. If the tie-rod II is equipped with a spacer disc or washerI2, the stop-piece 48 is operatively entered through the slot or way 38so as. to engage that portion thereof exposed through the slot or way,the remaining portions being abutted by those parts of the foot plate I4contiguous to the slot or way 38, thus firmly supporting the disc orwasher around its entire circular extent.

Preparatory to operating the tool, the free end portion of the tie-rodII, which projects outwardly beyond its point of infringement upon thewinch-roll I9, is bent at right angles to the rod axis, to form the bentportion Il', thus so disposing the free end of the tie-rod as to assureits clearance of the tool parts, when by operation of the latter coilingor winding of the same takes place coincident with extracting movementthereof.

With the tool thus applied, the hand lever I8 is oscillatingly swungback and forth, thereby drawing outward the tie-rod, and at the sametime bending the same around the winch-roll I9. As such bending of therod continues, the bent portions will be carried into engagement withthe sheer cam face 34 of the block 28, and, as moved in contacttherewith, will be caused to sheer outwardly in a spiral path, thusprogressively coiling the tie-rod as it is extracted and until it isentirely withdrawn, after which the tool is removed from the concretemass, whereupon said tie-rod may be removed laterally off the winchroll, freeing the tool for further use.

When it is desired to carry the tool about frotn place to place, thesame may be conveniently collapsed, and its parts axed together againstrelative movement in the following manner and by the following means.

Aixed to the foot-plate I4 is a perforate ear or lug 46, upon which ispivotally mounted a latch-hook 41 by means of a pivoting bolt 48 andclamping wing nut 49.

To collapse the tool, the handle lever I8 is swung to a positionparallel in plane to the foot plate I4, whereupon the latch-hook 4'I isturned to engage its hook-end over a portion of the pivot pin 26. Whenthe latch-hook 41 is thus engaged,

the wing nut 49 is tightened to secure the same against displacement. Itwill be obvious that the latch-hook 41, as thus operatively disposed,ties the foot plate I4 and handle lever I8 together against relativemovement, thus securing the tool in a collapsed condition for convenientcarrying about.

I am aware that various changes could be made in the construction of theabove described tool, and many apparently Widely different eimbodim'entsof the novel features of the present invention could be made Withoutdeparting from the scope thereof as dened by the following claims. It istherefore intended that all matter contained in the above descriptionand shown in the accompanying drawings shall be interpreted asillustrative and not in a limiting sense.

I claim:

1. In a tool for the purposes described, a foot plate, a hand leverfulcrumed in connection with said foot plate, a winch-roll rotativeabout the fulcrum of said hand lever, gripper means mounted on said handlever for cooperation with. said winch-roll, and a sheer cam blockadjustably mounted intermediate said foot plate and winch-roll andhaving a bearing face to abut the circumferential face of saidwinch-roll in sup-A porting relation thereto.

2. In a tool for the purposes described, a foot plate having a Way forthe extension of a tie-rod'A or the like therethrough, a hand leverfulcrumed in connection with said foot plate, a Winch-roll rotativeabout the fulcrum of said hand lever, gripper means mounted on said handlever forl cooperation With said Winch-roll, a sheer cam. meanscooperative with said Winch-roll, and a spacer disc or Washer stop-piecemovably mount-v ed relative to said foot plate for operative dispositionat will across and Within the Way thereof.

3. In a tool for the purposes described, a foot plate, a hand leverfulcrumed in connection with said foot plate, a Winch-roll rotativeabout the fulcrum of `said hand lever, gripper meansy mounted on saidhand lever for cooperation vvith` said Winch-roll, a sheer cam blockadjustably mounted intermediate said foot plate and winchroll and havinga bearing face to abut the cir-- cumferential face of said winch-roll insupport-- ing relation thereto, said foot plate having a Way for theextension of a tie-rod or the like therethrough, and a spacer disc orWasher stop-piecel tmovably mounted relative to said foot plate foroperative disposition at will across' and Within the way thereof.

4. In a tool for the purpose described, a foot plate, a hand leverfuiorumed in connection with said foot plate, a winch-roll rotativeabout the: fulcrum of said hand lever, gripper means: mounted on saidhand lever for cooperation with'. said winch-roll, a sheer cam meanscooperative: with said winch-roll, and releasable means for' immovablyholding said hand lever in collapsedl folded relation to said footplate.

5. In a tool for the purposes described, a foot plate having a way forthe extension of a tie rod or the like therethrough, a. bearing means'ycarried by said foot plate, a hand lever fulcrumed. on said bearingmeans, a Winch roll rotativeY about the fulcrum of said hand lever,gripper means mounted on said hand lever for coopera tion with saidwinch roll, a. sheer cam block. mounted intermediate said foot plate andwinch.

roll, and said block having portions lying in the path of movement ofsaid hand lever and adapted to provide stops to limit the swing of saidhand lever in each direction of its movement.

6. In a tool for the purposes described, a foot plate having a Way forthe extension of a tierod or the like therethrough, a bearing meanscarried by said foot plate, a hand lever fulcrumed on said bearingmeans, a winch roll rotative about the fulcrum of said hand lever,gripper means mounted on said hand lever for cooperation with said winchroll, a sheer cam block mounted intermediate said foot plate and Winchroll, said block having portions lying in the path of movement of saidhand lever and adapted to provide stops to limit the swing of said handlever in each direction of its movement, said sheer cam block having abearing face to abut the circumferential face of said winch roll insupporting relation thereto, and means for adjusting said block relativeto said Winch roll.

'7. In a tool for the purposes described, a foot plate having a Way forthe extension of a tierod or the like therethrough, a bearing meanscarried by said foot plate, a hand lever fulcrumed `on said bearingmeans, a winch roll rotative about the fulcrum of said hand lever,gripper means mounted on said hand lever for cooperation With .saidWinch roll, a sheer cam block mounted intermediate said foot plate andWinch roll, said block .having portions lying in the path of movement ofsaid hand lever and adapted to provide stops to limit the swing of saidhand lever in each direction of its movement, and a spacer disc orwasherv SOD piece movably mounted relative to said foot plate foroperative disposition at will across and 'within the way of the latter.

8. In a tool for the purposes described, a foot plate having a Way forthe extension of a tie-rod or the like therethrough, a bearing meanscarried by said footl plate, a hand lever fulcrumed on .said bearingmeans, a winch roll rotative about the fulcrum of said hand lever,gripper means :mounted on said hand lever for cooperation with `saidwinch roll, a sheer cam block mounted inter- :mediate said foot plateand winch roll, said block lhaving portions lying in the path ofmovement -of said hand lever and adapted to provide stops to limit theswing of said hand lever in each direction of its movement, said sheercam block Ihaving a bearing face to abut the circumferential ace of saidwinch roll in supporting relation "thereto, means foradjusting saidblock relative 'to said winch roll, and a spacer disc or washer .stoppiece movably mounted relative to said foot plate for operativedisposition at Will across and within the way of the latter.

9. In a tool for the purposes described, a foot jplate, a bearing meansincluding a bearing hub, ya journal bolt extending through said bearingmeans and its hub, a hand lever fulcrumed on .said journal bolt, a winchroll adjacent said hand .lever and rotative on said journal bolt, areen- :forcing yoke bar having one end fulcrumed on the journal bolt atthe outer end of said bearing :means hub and its other end fastened tosaid ihand lever, a gripper means also mounted on said .'hand lever forcooperation with said Winch roll, and a sheer cam block mountedintermediate said :foot plate and said winch roll and cooperative withthe latter.

SAMUEL S. COLT.

